Method of rolling flanged sections.



United States harem Oriana THOMAS MORRlsONpOF BRADDOCK, PENNSYLVANIA.

METHOD OF ROLLIINQ FLANGE!) SECTIONS.

SREGIFICATION forming part of Letters Eatent No. 722,605, dated March 10, 1903.

Application filed April 23, 1902. Serial No. 104,407. (No specimens.)

. Braddock, in the county of Allegheny and State of'Pennsylvania, have invented a new and useful Method of Rolling Flanged Sections, of which the following is a full, clear, I

method of my said patent the shapes havebeen cooled down before finishing them in the final pass of the mill, and the presentinvention is designed to maize it easier for the operator to bring the different sections to substantially the same temperature before final rolling, andthus to obtain more uniform results. The use of pyrometers in this connection has been found to be difficult.

My invention is based upon the discovery that the heat of each section before rolling in the final pass or passes can be ascertained relatively to that of other sections by comparing the amount of shrinkage after the 1 rails or other sections have been out from the a temperature before final rolling that in an eighty-five-pound rail the rail shall be out not over five and three-fourths (5%) inches longer than thirty (30) feet to give the desired thirty-foot rail. In such case, therefore, the hot saws used to sever the long rolled 5 section into rail lengths are set ata fixed distance apart, which is less'than five and threefourths (5%) inches and is preferably five and five-eighths (5%) inches longer than the thirty-foot length of the rail, and any slight variation in the final length of the rails after cooling can be reported by the straighteners to the operator controlling the group of rails being cooled before the final pass, and he will hold them a slightly greater or less length '5 5 of time upon the cooling-bed, whichever is necessary in order to correct such slight yariation.

It will be understood that the length of the section will be varied according to the Weight per pound and the final length desired; 85c.

I claim 1 The method herein described of treating flanged metal sections during the rolling thereof, consisting in cooling the flanged sections before the final pass, finish-rolling section in the final pass or passes, cutting said finished section into fixed lengths and controlling the time interval of said cooling by measuring the rail with relation to the length to which it will contract when cold; substantially as described.

In testimony whereof I have hereunto set my hand.

' THOMAS MORRISON.

Witnesses:

G. E. GRAY, J. E. MITCHELL. 

